HOLLOW-FIBER MEMBRANE AND PROCESS FOR PRODUCTION OF HOLLOW-FIBER MEMBRANE

摘要

A module provided with a hollow-fiber membrane which has a dense layer either on the inside or on the outside and in which the aspect ratios of pores formed on the dense-layer-side surface of the membrane are 3 to 5.  The module exerts purification performance higher than that expected to be attained by an increase in membrane area and can reduce the frequency of cartridge replacement.